of the critics of pope benedict said you don't come off the cross street is an act of enormous humility and honestly. >> how many of leaders give up power willingly? >> george washington is about the only one i can point to. it has not happened in 600 years, and you realize how vulnerable any to this institution is. the last time that happened was the center before columbus -- sentry before columbus. >> one of the reasons he decided to retire is that he was there when this previous pope had this long and agonizing death, and when he read about him being wheeled down the corridor, you realize that he was tired and depressed and human, actually. >> colby. >> know when to hold them and know when to fold them. he made the right call. >> he has his critics -- >> i am standing on the outside of this one. i just don't know enough -- >> in a way, you could say that he is starting a new tradition of introducing term limits. >> one of the factors, as some suggested, he did joined twitter and it has been a disappointment for millions of people. >> last word. see you next week.